Gage-tester.



R. C. COX. v 'GAGE TESTER. APPLICATION FILED AUG.2B. 1912.

1,21 8,060. Patented Mar. ,r 1917'.

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RTCHARD C. COX, 0F BOSTON, LIASSACHSETTS, -ASSIGNOR TO CROSBY STEAM GAGE &

VALVE COMPANY. OFBOSTON; MASSACHUSETTS, A CORPORATION. i

GAGE-TESTER.

Specification of' Letters Patent.

Patented Mar. 6, 1917.

Application led August 28, 19172. SerialiNo. 717,458.

To all lwhom t may concern:

Be it known that' l', Riel-IARD C; COX, a citizen of lthe United States, and resident of Boston, in the lcounty of Sulfolk and State of Massachusetts, have invented certain new and useful Improvements in Gage- Testers, of which the following is a specification.

This invention relates to pressure gage through guiding frame4, projected from said cylinder 2, andterminates in socket '5; the anti-friction wheel 6 is fixed to said piston 3; the lever 7 is fulcrumed on -li-nk 8 pivoted to arm 9 of frame 4; the roller 10, journaled in lever 7, engages roller 11 journaled in support 12 on arm 9, said rollers being held in rolling contact by link 13 connecting their axes; lever 7 is furnished with ball 14 adapted to engage socket 5 kof piston 3; said lever is furnished also with the extension 15 foldinglymounted thereon; to the inner end of said lever'is adjustably fixed the counterweight 16 and to its outer end the weight tray 17. Y

The'reservoir` chamber` 18 is mounted in frame 4.and tubular support 19, fixed to plate 1, or cast therewith, and is furnished with the cap 2O and threaded plunger 21 operated. by wheel`22; this chamber 18 communicates interiorly with cylinder 2 through tubular support 19 and pipe 23, in which is disposed valve l24; weights 25 `are stored on support 26 on plate 1; the pipe 27 leads from cylinder 2 ,and is adapted to be attached to'a pressure gage. v

The operation of the machine is as follows:

. The operator removescap 20, closes valve 24, screws plunger 21 into chamber 18 andl pours oil, through the opening made by the removal of the cap, into chamber 18, until the system, as far as the closed valve, is

acp filled, the plunger -21 being screwed outi wardly asy the oil is introduced; the operator'then replaces cap 20, opens valve 24, connects pipe 27 ,with the gage to be tested and screws the plunger inwardly, till the oil under pressure fills the gage and cylinder 2, raising the piston and lever to approximately the position shown in the drawing, in which position anti-friction wheel 6 has not come into contact with frame 4; he then closes valve 24 and, the machine being ready for making tests, places the weights successively upon the tray, thereby,

through vprerssure upon the oil, indicating correspondingy pressures upon the gage. While preparing for tests and while tests are being made, the operator rotates antifriction wheel 6.

The counterweight 16 furnishes means for balancing the lever on its fulcrum (link 8), the lever then preferably being in a horizontal position. The balance being complete, the counterweight may be locked in place by any suitable means, or the lever may be mounted in perfect balance and the counterweight omitted..

When the lever is in a horizontal position,

the direction of pressure of ball 14 on socket 5 of piston 3 is wholly vertical, thus avoiding friction between the piston and 'guiding frame, but in any other' position of the lever the direction of such pressure ceases to be wholly vertical and is partly 'Y lateral, and it is to avoid such lateral pressure and resulting friction thatv I employ link 13, whichvis so arranged as to exert a pull upon the lever adapted to lcounteract the lateral pressure described. v Y

As the lever is raised or lowered, the outer end of linkj13 engaging the axis of roller 10, journaled in the lever, describes an arc of a circle and the inner end of said link is pivoted at the center of such circle.

This center may be plotted either mathematically or experimentally.

Rollers 10 and 11y may be omitted and link `13 be pivoted directly to lever 7 and support 12 in any suitable manner. Roller 10 may be j ournaledin thelever at any convenient point on ei her side of ball 14, preferably however on the side indicated in the drawing; and the same is true of link 13, should the rollers be omitted.

Link 8, on which the lever is fulcrumed, maybe of any convenient length and may Veter not greater than that of the be so arranged as to be vertical when the lever is horizontal, or it may have any other angular relation to the lever, so long as it performs its function ofenabling ball 14 to travel a vertical path.

The pressure indicated on the gage, when a test is being made, will depend upon the relative lengths of the arms of the lever, the Weights used and the diameter of the piston.

Pipe 27 should preferably be of a diampiston and of short length.

Extension 15 of the .lever enables one to make higher tests with the same weights, or the vsame tests with lighter weights, thus adding materially tothe capacity of lthe tester without materially increasing its weight, or materially decreasing its weight without impairing its capacity.

The position of the lever, as shown in the drawing, may be called 'its initial position, while a horizontal may be called its normal position, but the lever-is balanced, whatever its position. The machine should preferably kbe so constructed that, when making the highest test of which it is capable, the lever would occupy a position below the horizontal n corresponding to its initial position above the horizontal (shown in the drawing) and the various parts of the'machine should beso constructed and sodisposed as to permit such range of movement of the lever.

The initial reading on the gage, before any test is made, will indicate the pressure due to the weight of the piston and iiywheel attached thereto.

Instead of proceeding in the manner described, it is perfectly obvious that the operator may make his tests in the following from a position slightly below the horizontal to the horizontal, orto a position slightly above the horizontal and any suitablemeans could be employed tov exert thepower neces- 'sary to voperate the plunger. Linkl could Vthen'l'ierhaps be omitted, particularly were klever givenv a very limitedrange of inove- 'ment,a'nd valve'Q-l could also be omitted.

Ifclaim: yl. VA pressure gage tester comprising in combination a cylinder; va pistontherein; a lever engagin'gsa'i'd piston and exerting a vvertical'pressure thereon; means for maintaining the 'direction of `said pressure; means for connecting the interior of said Cylinder with a pressure gage; and counterpoising means for said lever.

Q. A pressure gage tester comprising in combination, a cylinder; a piston therein; a`

lever engaging said piston and fulcrumed on a link ypivoted to said cylinder; said link; means for connecting the interior of said cylinder with a pressure gage; and counterpoising means for said lever.

3. A pressure gage tester comprising in combination, a cylinder, a piston therein; a lever engaging said piston and fulcrumed on a link pivoted to said cylinder; said link; a

second counteracting link connecting said lever with said cylinder; means for connecting the interior of said cylinder with a pressure gage; and counterpoising means for said lever. V

t. A pressure gage tester comprising in combination, a cylinder; a piston therein;

sure gage; means for rotating said piston; and counterpois'ing'means for said lever.

6. A pressure Ygage `tester comprising in combination, ya cylinder; a piston therein; a reservoir chamber communicating with said cylinder; a threaded plunger in said reservoir chamber;*a'lever'engaging said piston and'fulcrumed-on a link pivoted to said cylinder; said link; means for connecting the l` interior of said cylinder with a gage; means for yoperating said plunger; and counterpoising means for said lever.

7. A pressure gage tester comprising in combination, acylinder; apiston therein; a reservoir chamber communicating with said cylinderby avalve-controlled passage; said valve controlled passage; valve; a threaded plunger in said `reservoir chamber; a lever 'engaging vsaid piston and fulcrumed on a link pivoted to SaidcyIinder; said link; means for connecting theinterior of said cylinder witha gage; means for operating YVsaid plunger; and counterpoising means for said lever.

8. A pressure gage tester comprising in combination, a cylinder; a piston therein; a

'reservoir chamber communicating `with said *cylinder by a valve-controlled passage;

valve; a threaded plungerin said reservoir chamber; a lever engaging said piston and fulcrumed on va link pivoted to said cylinder; said link; a second counteraeting link connecting said lever With said eyhnder; means for connecting the interlor of sald cylinder With a pressure gage; means for operating said plunger; and counterpoising means for said lever. Y

9. A pressure gage tes-ter comprising in combination, a cylinder; a piston therein; a lever engaging said piston by a ball and socket joint and fulcrumed on a link pivoted to said cylinder; said link; means for conh neeting the interior of said cylinder with a pressure gage; and counterpoising means for said lever.

In testimony whereof I have aixed my signature, in presence of two Witnesses.

RICHARD C. COX. Witnesses:

CLARENCE L. NEWTON, RALPH W. FOSTER.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents,

Washington, D. G. 

